Metal working press



y 1932- R. w. GLASNER ET AL f 1,866,559

METAL WORKING PRESS Filed Jan 2. 1930 4 Sheets-Sheet 1 July 12, 1932.

R. w. GLASNER ET AL METAL WORKING PRESS Filed Jan. 2, 1950 y 1932- R. w. GLASNER ET AL 1,866,559

METAL WORKING PRESS Filed Jan. 2, 1930 4 Shee s he 3 y 1932- R. w.- GLASNER ET AL 1,866,559

.METAL WORKING PRESS Filed Jan. 2, 1930 4 Sheets-Sheet 4 Patented July 12, 1932 UNITED. STATES PATENT oFFIcE nunomm w. GLASNER AND amnion J. RODE, or CHICAGO,- rLLmors METAL WORKING PRESS Application filed January 2, 1930. Serial No. 417,934.

This invention relates in general to metal Working presses, particularly adapted, though not necessarily limited in its use with sheet metal die presses in which the wor 'is operated upon between two co-operatin dies,

' one of which is reciprocable towar and away from the other.

.In presses ofthis character different sized dies are employed according to the nature of m the work to be performed, and in order to vary the size of the die space it is necessary to adjust the ram or the bed of the press, with the result that heretofore the working height of the dies has been varied, in many instances rendering it inconvenient to the operator, with the further result that the efliciency of production is materially interfered with.

Further, it has heretofore been necessary to provide deep pits and foundations in connection with the presses when all of the adjustments have been made in the bed of the press, and the degree of adjustment or variation of the diespace has been small.-

vention to overcome these objections and difficulties and to provide in the press a large adjustment of the die space, at the same time maintain the dies at approximately the same 80 working height without increasing the working height of the bed of the press.

To that end improved means are provided whereby the adjustment of the die space will be divided between the bed of the press and- 85 the ram or reciprocable slide, with the result that the bed may be positioned at a convenient height for the operator to facilitate the handling of the work and thereby materially increase the efiiciency and speed of operation 4 of the press.

A further object is to provide improved means whereby the weight of the ram and the attached die will be counterbalanced, thereby relieving the crank shaft from excessive 46 strain in raising the ram.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement It is one of the objects of the present in-' able for the purpose may be provided, and

of'the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating vthis invention, and in which Figure 1 is a view partly in elevation, partly'in vertical section, partly broken away and with parts removed, of a press of this character constructed in accordance with the principles of this invention and showing the reciprocable ram and die carried thereby inv their lowermost positions.

Figure 2 is a detail sectional view taken on line 22, Figure 1. Figure 3 is a detail sectional view taken on line 3-3, Figure 2.

Figure 4 is a sectional view taken on line 4-4, Figure 1. J

Figure 5 is a detail sectional view taken on line 5-5, Figure 1.

Figure 6 is a view similar to Figure 4, showing the parts in another position.

Figure 7 is a detail sectional view, taken on line 7 7, Figure 1.

Referring more particularly to the drawings the numeral 10 designates generally the supporting uprights of the press and 11 a crank shaft which is operated from any suitable source of power and in any suitable manner, and the crank shaft 11 is connected by means of links 12 with a slide.. 13 mounted to move upon suitable guides 14;;

In the present form of the invention two of these slides 13 are shown, but it is to be understood that any number of slides; suitas the construction and operation of each of the slides and the co-operating and attached parts-thereto is the same, the description of one will apply equally as well to them all.

Threaded into the slide 13 are elongated shafts 15 provided with threaded portions 16 and the slides 13 are preferably split as at 17 and the split portions are clamped together by means of fastening bolts 18 and the threads 16 0f the shaft 15 engage in threads within the split portions of the slides. The shafts or rods 15 depend below the slide 13 and are journaled by their extremities in suitable bearings 19' in a reciprocable ram 20, the shafts 15' being preferably provided with shoulders 21 and bearing members 22 are threaded into the bearings 19, so as to lock the shafts 15 against longitudinal displacement with respect to the ram. Secured to the shafts 15 for rotation therewith and preferably in close proximity to the ram 20 are gear wheels 23, for a purpose'to be hereinafter set forth.

The shafts or rods 15 serve as a means for supporting the ram 20 from the slide 23 and by rotating the shafts 15 the position of the ram 20 may be varied with respect to the slides 13. Any suitable means may be provided for rotating the shafts 15 such as a shaft 24 which is provided with gears 25 on its extremities meshing with the gears 23 and the shaft 24 is journaled in suitable bearings 26.

Secured also to the shaft '24 for rotation therewith is a gear 27 (see particularly Figure 2) which meshes with agear 28. Connected with the gear 28 for rotation therewith is a worm gear 29 and meshing with the worm gear 29 is a worm 30 arranged within a housing 31 and secured to a shaft 32 for rotation therewith. The shaft 32 is provided .with a portion 33 which is angular in cross section and passes loosely through a gear 34 rotatably supported by a bearing 35. The shaft 32 is adapted to be adjusted lengthwise of its diameter and with respect. to the gear 34, and during such adjustment the angular portion 33 of the shaft 32 will slide through the gear 34 but thegear will be connected to the shaft 32 for rotation therewith. The gear 34 meshes with a gear 36 on a shaft 37 to which a pulley 38 is connected. A belt 39 passes over the pulley 38 and also over a pulley 40 on the shaft 41 of the motor 42. The motor 42 may be controlled from any suitable point and when the motor is set in opera- 1 tion the shaft 32 will be rotated and this rotary motion will be imparted to the shaft 24 to rotate the shafts 15 and thereby raise or lower the ram 20 with respect to the slides 13, according to the direction of rotation of the shafts 15.

Supported upon the frame of the press is a cylinder 43, one for each of the shafts 15.

r A piston 44 is reciprocable in the cylinder and connected with the piston is a piston rod 45 which extends through the end of the cylinder and also through a suitable packing or stationary box 46 and is hollow. The hollow portion of the piston rod is threaded as at 47 and the threaded end 16 of the shaft 15 passes into or telescopes with the tubular piston rod 45 and the threads enter into co-operative relation with each other.

A rod or guide 48 is anchored at one end as at 49, preferably to the top of the cylinder 43 and passes through the piston 44 and into the tubular piston rod 45, and is also adapted to pass into the tubular end of the rods or shafts15. This rod 48 serves the means of preventing the piston 44 from rotating in the cylinder 43, and to that end the rod or guide 48 is preferably angular in cross section to conform with the opening in the piston 44.

A vent opening 50 is provided in the top of the cylinder 43. r

Thus it will be seen that when the shafts 15 are rotated the relative position of the ram In order to 210-.

end a pipe 52 has connection with the cylinders beneath the pistons 44 and this pipe in turn has connection with a fluid, pressure tank 53, suit-ably located and which fluid pressure tank receives its supply of fluid from any suitable source through a pipe 54. A pressure regulating valve 55 is provided in the pipe 54 to control and vary the degree of pressure in the cylinders 43.

During the reciprocation of the ram 20 and slide 13 while the press is in operation, the pistons 44 will reciprocate in'the cylinders 43, and during the upstroke of the ram and slide the fluid pressure in the container 53 operates upon t e lower face of the pistons '44 and will counterbalance the weight of the ram 20 and die. 51, any air or fluid on the upper sides of the pistons escaping through the openings 50.

During the descent of the ram the pistons 44 will be lowered in the cylinder 43 and the fluid beneath the pistons 44 will be forced back into the tank orcontainer 53, but as the pressure inthe tank 53 is the pressure at which it is desired to maintain the fluid, such fluid will flow back and forth between the cylinders and container during the reciprocatory movement of the pistons 44 in their cylinders.

The bed 56 of the press is also ad'ustable so as to maintain the working level 0 the die '57 thereon at the desired elevation.

Any suitable means may be provided for adjusting the bed 56, such as the means disclosed herein. but the specific construction of the bed adjusting means constitutes the subject matter of a separate application, Serial Number 410,317, filed November 29, 1929, and is only described herein in order to give a full and clear understanding of the cooperation of the adjustment of the bed plate with the adjustment of the ram 20.

The bed 56 is supported by means of a cushioning device embodying generally a chamber 58 having tubular members 58 extending through the top 60 thereof. Pistons 61 recipor formed over the die 57.

Depending from the bed plate, 56 are toothed members 66 with which locking members 67 having teeth 68 co-operate. These members 68 are adapted to slide in suitable bearings 69 in the frame of the press and are war y into and out of co-operative relation with the toothed members'66. To that end cylinders 70 are provided in which pistons 71 operate. The pistons are connected b means of iston rods 72 with the members 6 and exit of the fluid into the cylinders 70 on one or the other side of the piston 71 therein. Guides 7 8 are provided for guiding the locking movement of the members 67 and locking nuts or collars 79 are threaded on the guides so as to hold the locking members 67 in the position shown in Figureis when the members arein this position the bed 56 will be held against-movement by the pressure of the fluid in the chamber '58 and the pin. plate or body 62 together with the pistons 61 may then be moved against the resistance pressure createdby the fluid inthe chamber 58 to yieldingly resist the movement of the work ho der 64 under the action of the die 51.

When, however, it is desired to raise the bed 56 of the press the nuts or collars 59 are loosened and fluid is admitted under the piston 71 so as to retract the members 67, thereby causing the teeth 68 to disengage the teeth of the locking member 66. At this time the pressure of the fluid in the chamber 58 will move the pistons-61 with respect to the bed 56 of. the press until the bodyjor' pin plate 62 engages the bottom of the bed 56. The fluid pressure in the chamber 58 will ,then cause the bed 56 to be raised. When the proper height is obtained-the members 67 are again adjusted and the nuts or collars 79 tightened. a

To lower the bed 56 .the bed isunlocked by drawing back the members 67 and by exhausting the fluid in the chamber 58 .or reducing the pressure of the fluid. V

With this improved construction it will be manifest that no matter what size of die 57 is mounted upon the bed plate 56,- the bed plate adasted to be moved forwardly and back-' may be adjusted to any desired height so as to maintain the die at approximately. the same working height without materially increas ing the height of the bed. I

In order to accomplish this it is not only necessary to adjust the bed but, it is also,

necessary to adjustthe ram to compensate the variation in the size of the die space. This is accomplished by dividing the adjustment between the ram and thebed, and furthermore by such adjustment it is possible to eliminate or dispense with pits of great depth,

and at the same time theworking level of the dies will be established and maintained at a convenient height for the operator.

This is quite a desideratum in presses of this character as the variation in the working height of dies seriously handicap the working conditions and work of the operator. By maintaining the working height of the dies atsubstantially the same height, the rate of production is greatly increased and the operator will be relieved of considerable effort in the lifting of the work and can assume a comfortable position during the operation of the press. a

While the preferred form of the invention has been herein shown and described, it is to be understood that various changesmay be made in the details of construction and in the combination and arrangement of the several parts, within the scope ofthe claims, wlth- -set throw and providing a die space therebe tween, and means for adjusting the ram and the bed with respect to each otheruto vary the said die space to compensate different size dies, while theworkingheight of the various dies. is maintained substantially the same, the last recited means being operable to impart diflerent fixed extents of adjust- .ment to the bed. Y

2. A press of the character described embodying an adjustable bed, a ram 1 eciprocable towards and away from the bed with a set throw and providing a die space therebetween, and means individual to the ram and the bed for adjusting them one with respect to the other to vary'the die space to compensate dies of different sizes whiletheworking height of the various dies is maintained substantially the same, the bed adjusting means v being operable to impart different extents of adjustment to the bed.

3. A press of the character describ d embodying a'bed, areciprocable ram having a set throw, means for adjusting the bed to compensate dies of different sizes and for maintaining the working height of the' dies substantially the same, and means for ad ust Ill ing the ram with respect to the bed to compensate the adjustment of the latter, while the extent of throw of the ram with respect to the bed remains constant.

4. A press of the character described embodying a bed, a recpirocable ram having a set throw, means for adjusting the bed to compensate dies of different sizes and for maintaining the working height of the dies substantially the same, means for adjusting the ram with respect to the bed to compensate the adjustment of the latter, while the extent of throw of the ram with respect to the bed remains constant, and means for counterbalancing the ram.

5.,, A press ofthc character described embodying a bed, a reciprocable ram havin a set throw, means for adjusting the bed to compensate dies of different sizes and for maintaining the working height of the dies substantially the same, means for adjusting the ram with respect to the bed to compensate the adjustment of the latter, while the extent of throw of the ram with respect to the bed remains constant, and fluid pressure means for counterbalancing the ram.

6. A press of the character described embodying a bed, a reciprocable ram having a set throw, means for adjusting the bed to compensate dies of different; sizes and for maintaining the working height of the dies substantially the same, means for adjusting the ram with respect to the bed to compensate the adjustment of the latter, while the extent of throw of the ram with respect to the bed remains constant, fluid pressure means for counterbalancing the ram, and means whereby said fluid pressure may be varied.

7 In a press of the character described, an adjustable die supporting bed, a ram reciprocable with a set throw and providing with the bed a die space therebetween, and means for adjusting both the ram and the said bed with relation to each other to vary the size of the said die spacewhile the working height of the die remains substantially the same, the means for adjusting said bed being operable to impart different degrees of adjustment thereto.

8. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with a set throw and providing with said bed a die space therebetween, and means for varying the size of the die space while the working height of the die is maintained substantially the same, the meanswherebv the said die space may be varied being dividable between the said bed and ram, the bed adjusting means being operable to impart different degrees of adjustment thereto.

9. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with a set throw and providing with said bed a die space therebetween, means for varying the size of the die space while the working height of the die is maintained substantially the same, the means whereby the said die space may be varied being dividable between the said bed and ram, and means for counterbalancing the ram.

10. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with a set throw and providing with said bed a die space therebetween,-means for varying the size of the die space while the working height of the die is maintained substantially the same, the means whereby the said die spacemay be varied being dividable between the said bed and ram, and fluid pressure means for counterbalancing'the ram.

11. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with a set throw and providing with said bed a die space therebetween, means for varying the size of the die space .while, the working height of the die is maintained sub stantially the same, the means whereby the said die space may be varied being dividable between the said bed and ram, and fluid pressure means for counterbalancing the ram, said fluid pressure means embodying a relatively movable cylinder and piston, one of which is connected with the ram and the other connected with a fixed support and means for supplying fluid pressure to the cylinder.

12. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with respect to the bed and having a fixed throw and providing with said bed a die space therebetween, and means for varying the size of said die space while maintaining substantially the same working height of the die, the last said means embodying means for imparting different extents of adjustment to the bed.

13. In a press of the character described, an adjustable die supporting bed, a ram reciprocable with respect to the bed and having a fixed throw and providing with said bed a die space therebetween, and means for varying the size of said die space while 1naintaining substantially the same working height of the die, the means for varying the said space being dividable between the ram and said bed, the bed adjusting means being operable to impart different degrees of adj ustment thereto.

14. In a press of the character described, a die supporting bed, a ram reciprocable with respect to the bed and having a fixed throw and providing with said bed a die space therebetween, means for varying the size of said die space while maintaining substantially the same working height of the die, and means for counterbalancing the ram.

15. In a press of the character described, a ram reciprocable with a set throw, a crank, a slide. connected with the crank, rotatable upright rods connected with the ram and having threaded connection with said slide,

' position of the ram with respect to the axis means for actuating the rods to vary the set of the crank, and counterbalancing means for the ram connected with said rods.

16. In a press of the character described, a ram reciprocable with a set throw, a crank, a slide connected .with the crank, rotatable upright rods connected with the ram and having threaded connection with said slide,

means-for actuating the rods to vary the set position of the ram with respect to theaxis of the crank, and fluid pressure counterbalancing means for the ram connected with said rods.

'17. In a press of the character described, a ram reciprocable with a set throw, a crank, a slide connected with the crank, rotatable upright rods connected with the ram and having threaded connection with said slide,

means for actuating the rods'to vary the set position of the ram with respect to the axisof the'crank, counterbalancing means for the ram connected with said rods,.said counterbalancing means embodying cylinder and piston elements, one of which is connected with a stationary part of the press and the other with the rod, and means for supplying fluid pressure to the cylinders.

In testimony whereof we have*signed our on this 24th day names to this specification,-

of December, A. D. 1929.

RUDOLPH W. GLASNER.

FREDRICH" J. RODE. 

